Impeller



FIG. 1 is a front top perspective view of an impeller showing my new design;

FIG. 2 is a bottom-rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a cross-sectional view of the impeller taken along the line 6-6 shown in FIG. 4; and,

FIG. 7 is a cross-sectional view of the impeller taken along the line 7-7 shown in FIG. 4. 

CLAIM The ornamental design for an impeller, as shown and described. 